/Engine/Source/Runtime/Engine/Classes/Engine/MapBuildDataRegistry.h
Allocates a newFLightComponentMapBuildDatafrom the registry. Warning: Further allocations will invalidate the returned reference.
[FLightComponentMapBuildData](API\Runtime\Engine\Engine\FLightComponentMapBuildData) & FindOrAllocateLightBuildData ( [FGuid](API\Runtime\Core\Misc\FGuid) LightId, bool bMarkDirty )